The United Geodetic Vertical Network of Latvia and Lithuania

Aleksejenko, Ivars; Sakne, Jānis; Kaļinka, Māris; Reiniks, Mārtiņš; Kalantaitė, Aušra; Krikštaponis, Boleslovas; Paršeliūnas, Eimuntas; Petroškevičius, Petras; Viskontas, Povilas

doi:10.3846/20296991.2012.679800

Cited by 9 publications

(6 citation statements)

References 3 publications

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“…Its development was finished in 2006. Connections of the first order vertical network with the vertical networks of neighbouring countries were established (one -with Polish vertical network, three -with Latvian vertical network) [9][10][11]. All this creates good preconditions for determination of relations between height systems and for introduction of a new Lithuanian geodetic vertical (height) system.…”

Section: Introductionmentioning

confidence: 99%

Designing issues of the geodetic vertical reference network of Lithuania

Krikštaponis

Paršeliūnas

Viskontas

et al. 2014

The 9th International Conference "Environmental Engineering 2014"

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Activities of Lithuanian National Geodetic Vertical Reference Network (NGVRN) establishment are going on since 1998. The goal of NGVRN establishment is a creation of new Lithuanian height reference suitable for present period practical and scientific needs. The Lithuanian Geodetic Vertical First Order Network consists of five polygons. Perimeter of the network is ca. 1900 km. Its development was finished in 2006. Connections of the first order vertical network with the vertical networks of neighbouring countries were established. All this creates good preconditions for determination of relations between height systems and for introduction of a new Lithuanian geodetic vertical (height) system. But this network is not dense enough to transfer the geodetic vertical system to the all territory of Lithuania and to improve the geoid model. It is necessary to dense available First Order Geodetic Vertical Network by developing the Second Order Geodetic Vertical Network. The territory of Lithuania is divided into five regions. Borders of the regions are First Order Network levelling lines and lines connecting Lithuanian national Vertical Network to the corresponding networks of the neighbouring countries. The regions are called: South, East, North, West and Centre. The design of the Second Order Geodetic Vertical Network is presented. The necessary density, accuracy of the geopotential numbers and ellipsoidal heights are discussed. Some results of the geodetic measurements are presented too.

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Section: Introductionmentioning

confidence: 99%

Designing issues of the geodetic vertical reference network of Lithuania

Krikštaponis

Paršeliūnas

Viskontas

et al. 2014

The 9th International Conference "Environmental Engineering 2014"

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“…Increasing the accuracy of geodetic measurements requires a more accurate assessment of non-parallelity of the equipotential surfaces. It is important for the development of modern geodetic basis [1,2], establishment of geodetic networks [3,4], geodetic works in unique objects (hydrotechnical equipment, tunnels, elementary particle accelerators, etc.) in the period of their construction and operation.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the determination feasibility of the non-parallelity of the gravity field equipotential surfaces

Petroškevičius

Birvydienė

Obuchovski

2014

The 9th International Conference "Environmental Engineering 2014"

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Geodetic measurements are performed in heterogeneous gravity field. Its equipotential surfaces have a complex shape. This needs to be estimated when processing detail geodetic measurements data. Orthometric heights are calculated from one of the equipotential surfacegeoid. Applying the normal height system and evaluating normal height differences needs to assess the non-parallelity of the equipotential surfaces of the gravity field. For that aim normal corrections, defining the non-parallelity of equipotential surfaces of normal gravity field and the deviation of the equipotential surfaces of real gravity field from the normal field are calculated. This work presents determination feasibility of the gravity field equipotential surfaces non-parallelity in Lithuanian territory. The six geodetic vertical network lines were selected for a research; the length of all lines is about 300 km. The gravimetric measurements by Scintrex CG-5 were performed at 203 points of the net. A mean square error of gravity acceleration values did not exceed 14 µGal. The normal corrections were calculated for measured height differences between points. A research shows that after reduction of a number of measured points twice, a mean square error of gravity acceleration values, calculated from interpolated Bouguer gravity anomalies, at the "not measured" points seeks 0.474 mGal, however the normal correction values have changed only in 0.01 mm. The use of gravity acceleration values, obtained from gravimetric map with the mean square error of 0.684 mGal, changes normal corrections up to 0.04 mm.

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“…Parseliunas, P. Petroskevicius, P. Viskontas, R. Jaeger, G. Younis, A. Ellmann, L Jivall, J. Kaminskis, I. Janpaule, J. Balodis, I. Aleksejenko, M. Kalinka, etc. [1], [2], [4], [6], [8]- [15], [17], [21], [24].…”

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confidence: 99%

“…The Baltic geoid is fundamentally important for the joint interconnection of the Baltic height systems. [2], [22], but each of them requires a superior geoid model. The exact geoid model is highly topical to move closer to the European Vertical Reference System (of the EVRS) requirements and needs.…”

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confidence: 99%

Evaluation of Transition to Updated Regional Q-Geoid Model

Kaminskis

Vallis²,

Stāmure

et al. 2018

Latvian Journal of Physics and Technical Sciences

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During the last years, the European and the Nordic quasi-geoid models and existing national q-geoid models covered the territory of Latvia. There are many ways for comparison and tests of results achieved. Scientists and professionals can compare models directly at some special geodetic co-location stations or use GNSS/levelling sites. The results of this research can be used by scientists and specialists in the fundamental geodetic observations for independent monitoring of existing q-geoid models and evaluation of accuracy. The research aims at evaluating the transition to the best updated regional q-geoid model. The research objectives are the following: 1) to investigate and analyse the development of q-geoid model LV14; 2) to conduct precision research; 3) to assess the challenges of the European Vertical Reference System; 4) to draw conclusions that allow for further research in this area for development and improvement. Within the framework of the research, the authors have used a variety of research methods. Historical and logical approaches, comparative analysis and synthesis methods, as well as inductive – deductive data analysis methods have been selected for the research. A conclusion for such kind of studies is to implement the most appropriate q-geoid solution and to develop new astrogeodetic methods for unification, monitoring and for reliability of a geodetic reference network.

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The United Geodetic Vertical Network of Latvia and Lithuania

Cited by 9 publications

References 3 publications

Designing issues of the geodetic vertical reference network of Lithuania

Designing issues of the geodetic vertical reference network of Lithuania

Investigation on the determination feasibility of the non-parallelity of the gravity field equipotential surfaces

Evaluation of Transition to Updated Regional Q-Geoid Model

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